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DBMS > Citus vs. IBM Db2 vs. Memcached

System Properties Comparison Citus vs. IBM Db2 vs. Memcached

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Editorial information provided by DB-Engines
NameCitus  Xexclude from comparisonIBM Db2 infoformerly named DB2 or IBM Database 2  Xexclude from comparisonMemcached  Xexclude from comparison
DescriptionScalable hybrid operational and analytics RDBMS for big data use cases based on PostgreSQLCommon in IBM host environments, 2 different versions for host and Windows/LinuxIn-memory key-value store, originally intended for caching
Primary database modelRelational DBMSRelational DBMS infoSince Version 10.5 support for JSON/BSON documents compatible with MongoDBKey-value store
Secondary database modelsDocument storeDocument store
RDF store infoin DB2 LUW (Linux, Unix, Windows)
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score1.00
Rank#152  Overall
#73  Relational DBMS
Score168.70
Rank#6  Overall
#5  Relational DBMS
Score25.11
Rank#28  Overall
#4  Key-value stores
Websitewww.citusdata.comwww.ibm.com/­analytics/­db2www.memcached.org
Technical documentationdocs.citusdata.comwww.ibm.com/­support/­knowledgecenter/­SSEPGGgithub.com/­memcached/­memcached/­wiki
DeveloperIBMDanga Interactive infooriginally developed by Brad Fitzpatrick for LiveJournal
Initial release20101983 infohost version2003
Current release8.1, December 201812.1, October 20161.5.12, November 2018
License infoCommercial or Open SourceOpen Source infoAGPL, commercial license also availablecommercial infofree version is availableOpen Source infoBSD license
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
Implementation languageCC and C++C
Server operating systemsLinuxAIX
HP-UX
Linux
Solaris
Windows
z/OS
FreeBSD
Linux
OS X
Unix
Windows
Data schemeyesyesschema-free
Typing infopredefined data types such as float or dateyesyesno
XML support infoSome form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.yes infospecific XML type available, but no XML query functionality
Secondary indexesyesyesno
SQL infoSupport of SQLyes infostandard, with numerous extensionsyesno
APIs and other access methodsADO.NET
JDBC
native C library
ODBC
streaming API for large objects
ADO.NET
JDBC
JSON style queries infoMongoDB compatible
ODBC
XQuery
Proprietary protocol
Supported programming languages.Net
C
C++
Delphi
Java
JavaScript (Node.js)
Perl
PHP
Python
Tcl
C
C#
C++
Cobol
Delphi
Fortran
Java
Perl
PHP
Python
Ruby
Visual Basic
.Net
C
C++
ColdFusion
Erlang
Java
Lisp
Lua
OCaml
Perl
PHP
Python
Ruby
Server-side scripts infoStored proceduresuser defined functions inforealized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.yesno
Triggersyesyesno
Partitioning methods infoMethods for storing different data on different nodesShardingSharding infoonly with Windows/Unix/Linux Versionnone
Replication methods infoMethods for redundantly storing data on multiple nodesMaster-slave replication infoother methods possible by using 3rd party extensionsyes infowith separate tools (MQ, InfoSphere)none infoRepcached, a Memcached patch, provides this functionallity
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate Consistency
Foreign keys infoReferential integrityyesyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDACIDno
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyesyesno
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.no
User concepts infoAccess controlfine grained access rights according to SQL-standardfine grained access rights according to SQL-standardyes infousing SASL (Simple Authentication and Security Layer) protocol

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More resources
CitusIBM Db2 infoformerly named DB2 or IBM Database 2Memcached
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Recent citations in the news

Microsoft acquires Citus Data
24 January 2019, TechCrunch

Microsoft Expands Azure PostgreSQL Moxy Through Citus Data Purchase
30 January 2019, Data Center Knowledge

Microsoft Acquires Citus Data to Dive Deeper into Postgres
30 January 2019, eWeek

Citus Data Announces Citus Cloud Database Support for HIPAA and SOC 2 Type 2 Compliance
13 November 2018, Business Wire

Microsoft rolls out new performance-scaling features for Azure databases, including serverless Azure SQL
6 May 2019, GeekWire

provided by Google News

Where Does SAP On IBM i Go From Here?
15 January 2020, IT Jungle

Linux Bonus Pack Makes SAP Hana Movers Happy
14 January 2020, E3zine.com

Splice Machine 3.0 Offers New and Improved SQL Updates
15 January 2020, Database Trends and Applications

IBM Injects 'Data Science' AI Into Its Db2 Database
4 June 2019, Forbes

SD Times news digest: Quantum Machines joins IBM Q network, Next.js 9.2, Splice Machine 3.0 now available
16 January 2020, SDTimes.com

provided by Google News

What are memcached servers, and why are they being used to launch record-setting DDoS attacks?
6 March 2018, GeekWire

One Of The Reasons Why Linux 5.5 Can Be Running Slower
29 December 2019, Phoronix

Reducing Managed Memcache Cost with NVM
15 January 2019, The Next Platform

How to enable caching on Nextcloud 16
2 September 2019, TechRepublic

Nexusguard Research Shows DNS Amplification Attacks Grew Nearly 4,800% Year-over-Year; Highlighted by Sharp Increase in TCP SYN Flood
6 January 2020, Business Insider

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